Add the code

exporter.go

@@ -0,0 +1,64 @@
+package main // import "github.com/DrJosh9000/lifepo4wered-exporter"
+
+import (
+	"bufio"
+	"bytes"
+	"flag"
+	"fmt"
+	"log"
+	"net/http"
+	"os/exec"
+	"time"
+
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/promhttp"
+)
+
+var (
+	addr = flag.String("listen-address", ":8080", "The address to listen on for HTTP requests.")
+
+	lifepo4weredVars = prometheus.NewGaugeVec(prometheus.GaugeOpts{
+		Name: "lifepo4wered",
+		Help: "Variables gathered from the lifepo4wered-cli tool",
+	},
+		[]string{"var"})
+)
+
+func init() {
+	prometheus.MustRegister(lifepo4weredVars)
+}
+
+func getVars() {
+	cmd := exec.Command("lifepo4wered-cli", "get")
+	out, err := cmd.Output()
+	if err != nil {
+		log.Fatalf("Couldn't execute command: %v", err)
+	}
+	s := bufio.NewScanner(bytes.NewReader(out))
+	for s.Scan() {
+		// token space equals space number
+		var name string
+		var num int
+		if _, err := fmt.Sscanf(s.Text(), "%s = %d", &name, &num); err != nil {
+			log.Fatalf("Couldn't scan line: %v", err)
+		}
+		lifepo4weredVars.With(prometheus.Labels{"var": name}).Set(float64(num))
+	}
+	if err := s.Err(); err != nil {
+		log.Fatalf("Couldn't scan output: %v", err)
+	}
+}
+
+func main() {
+	flag.Parse()
+
+	getVars()
+	go func() {
+		for range time.Tick(15 * time.Second) {
+			getVars()
+		}
+	}()
+
+	http.Handle("/metrics", promhttp.Handler())
+	log.Fatal(http.ListenAndServe(*addr, nil))
+}

go.mod

@@ -0,0 +1,3 @@
+module github.com/DrJosh9000/lifepo4wered-exporter
+
+require github.com/prometheus/client_golang v0.9.2

go.sum

@@ -0,0 +1,16 @@
+github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973 h1:xJ4a3vCFaGF/jqvzLMYoU8P317H5OQ+Via4RmuPwCS0=
+github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
+github.com/golang/protobuf v1.2.0 h1:P3YflyNX/ehuJFLhxviNdFxQPkGK5cDcApsge1SqnvM=
+github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/matttproud/golang_protobuf_extensions v1.0.1 h1:4hp9jkHxhMHkqkrB3Ix0jegS5sx/RkqARlsWZ6pIwiU=
+github.com/matttproud/golang_protobuf_extensions v1.0.1/go.mod h1:D8He9yQNgCq6Z5Ld7szi9bcBfOoFv/3dc6xSMkL2PC0=
+github.com/prometheus/client_golang v0.9.2 h1:awm861/B8OKDd2I/6o1dy3ra4BamzKhYOiGItCeZ740=
+github.com/prometheus/client_golang v0.9.2/go.mod h1:OsXs2jCmiKlQ1lTBmv21f2mNfw4xf/QclQDMrYNZzcM=
+github.com/prometheus/client_model v0.0.0-20180712105110-5c3871d89910 h1:idejC8f05m9MGOsuEi1ATq9shN03HrxNkD/luQvxCv8=
+github.com/prometheus/client_model v0.0.0-20180712105110-5c3871d89910/go.mod h1:MbSGuTsp3dbXC40dX6PRTWyKYBIrTGTE9sqQNg2J8bo=
+github.com/prometheus/common v0.0.0-20181126121408-4724e9255275 h1:PnBWHBf+6L0jOqq0gIVUe6Yk0/QMZ640k6NvkxcBf+8=
+github.com/prometheus/common v0.0.0-20181126121408-4724e9255275/go.mod h1:daVV7qP5qjZbuso7PdcryaAu0sAZbrN9i7WWcTMWvro=
+github.com/prometheus/procfs v0.0.0-20181204211112-1dc9a6cbc91a h1:9a8MnZMP0X2nLJdBg+pBmGgkJlSaKC2KaQmTCk1XDtE=
+github.com/prometheus/procfs v0.0.0-20181204211112-1dc9a6cbc91a/go.mod h1:c3At6R/oaqEKCNdg8wHV1ftS6bRYblBhIjjI8uT2IGk=
+golang.org/x/net v0.0.0-20181201002055-351d144fa1fc/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=